This Costa Rican chapel is the most metal church in the world, literally.

Once the foundation for a mansion, these ruins now offer amazing panoramic coastal views.

Copenhagen's "other" little mermaid marks the historic location of past sea maid sightings.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

Cat art as far as the eye can see.

A giant floating rubber duck-bunny painted with a different design every year.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

A modern reimagining of a medieval city gate.

A nearly 25-foot concrete sculpture of Sylvette, Picasso's muse.

This charming pup is meant to celebrate the youth and stubbornness of the city's students.

Rotterdammers' dirty minds gave this Santa a dirty nickname and cursed it to a life of wandering.

Vortex-shaped aquarium hosts Europe's largest school of piranhas and other ocean creatures.

Some of the greatest minds in the history of Hungarian art and science converged in this café.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

On a teardrop-shaped island in the Danube, the ruins of a convent and the final resting place of a saint.

Once the home of a hermetic monk, this cave now houses a small church.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

A grumpy old water goblin guarding an old mill on the Devil’s Stream in Prague.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

Nine bronze hands protruding from a wall honor the student uprising that led to the fall of Czechoslovakia's Communist government.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”